Counterbalanced crank-shaft.



No. 241,057. I PATENTED OCT. 13, 1903.

. A. 'R'; MOSLER. GOUNTERBALANGED CRANK SHAFT.

APPLICATION FILED OUT. 24. 1901.

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iatented October 13, 1903.

OF NEW YORK, N. Y.

COUNTERBALANOED CRANK-SHAFT.

QPEGIFIGATION forming part of Letters Patent No. 741,057, dated October13, 1903.

I Application filed October 24, 1901. Serial No- 79,'752. We model.)

T alt whom it 11mg] concern:

Be it known that I, ARTHUR R. MosLER, a citizen of the United States,and a resident of the borough of Manhattan, in the city and State of NewYork, have invented new and useful Improvements in OounterbalancedCrank-Shafts forExplosive Hydrocarbon-Engines, of which the following isa specification.

My invention relates to an improvement in counterbalanced crank-shaftsfor explosive hydrocarbon-engines, and has for its object to provide adevice of the above character in which the eff ciency of the engine isincreased by insuring an even rotary movement of the crank-shaftirrespective of the speed of the same.

A further object is toprovide an improvement of the above characterwhich is more particularly adapted to use in connection with thecrank-shafts of hydrocarbon-engines having-their pistons and cylindersarranged upon opposite sides of the shaft.

A practical embodiment of my invention is represented in theaccompanying drawings, in which Figure 1 is'a partial central verticalsection.

through an engine having my improved counterbalanced crank-shaft. Fig. 2is a' partial central horizontal section throughthe same, and Fig. 3 isa view inperspective of one of the counterbalance-diskswhich are securedto the crankshaft.

The crank-shaft casing comprises a cylindrical body portion 1, havingits ends closed by end plates or heads 2 and 3;

The crankshaft is denoted by 4, and it is mounted in bearings incentrally-arranged hubs 5 and 6, carried by the plates or heads 2 and 3of the crank-shaft casing. The crankshaft 4 is provided within thecasing with three crank-arms 7, 8, and 9, the arms 7 and 8 projecting inopposite directions and the ends of thecentral arm 8 being connected bysuitable crank-pins 10 and 11 with the outer ends of the crank arms 7and 9, respectively.

Acentral counterbalance-disk 12 is secured to the middle arm 8 of thecrank-shaft in the following manner: The disk 12 is fitted to theperiphery of the double crank-arm 8 and is secured thereto by meansof aplurality of screws 13, which engage adjacent half-sockets in the innerwall of the disk 12 and the periphery of the crank-arm. Counterbalanoe-disks 14 and 15 of considerable thickness are secured to thecrank-arms 7 and 9 of the crank-shaft in the following manner: The disk14 is fitted to the periphery of the crank-arm 7 and is secured thereonby means of a plurality of screws 16, which engage adjacent half-socketsin the inner wall of the disk 14 and the periphery of the crank-arm 7.The counterbalance-disk 15 is similarly secured to the crank-arm 9 onthe shaft 4 by means of screws 17, which engage opposite half-sockets inthe inner wall of the disk and the periphery of the crank-arm 9. Thesedisks 14 and 15 are cut away on their inner faces, as shown at 18 and19, for permitting the free attachment and also free running of thepiston-rods 20 and 21, the inner ends of which areconnected to thecrank-pins 10 and 11, respectively, of the engine-shaft 4. Thesecounterbalance-disks serve to materially aid in the smooth andevenrunning of the engine-shaft and also fill up a large portion ofthe-interior of the crank-shaft casing.

The engine herein represented is of the straight-linelduplex type, andthe cylinders are denoted by 22 23, respectively.

disks to the arms engaging adjacent half- 5 sockets in the inner Wallsof the disks'and the peripheries of the arms.

3. A crank-shaft having two oppositely-projected arms and anintermediate double arm, crank-pins connecting the arms, piston-rodsconnected to the crank-pins and counterbalmy invention I have signed myname, in ance-disks removably secured to the said oppresence of twowitnesses, this 17th dayof Ocpositely-projected arms, the said disksbeing tober, 1901. cut away on their inner faces for permitting I ARTHURR. MOSLER. the free attachment and running of the said WVitnesses:

piston-rods.

In testimony that I claim the foregoing as FREDK. HAYNES, O. S.SUNDGREN.

